The Collaborative International Dictionary of English v.0.48:
Paducahs \Pa*du"cahs\ (p[.a]*d[=u]"k[.a]z), n. pl.; sing. Paducah (-k[.a]). (Ethnol.) See Comanches. [1913 Webster]WordNet (r) 3.0 (2006):
Paducah n 1: a town in western Kentucky on the Ohio River